docs: def validate_metadata(self, metadata):
          """
          Validate that the metadata of your ddo is valid.
  
          :param metadata: conforming to the Metadata accepted by Ocean Protocol, dict
          :return: bool
          """
          response = self.requests_session.post(
              f'{self.url}/validate',
              data=json.dumps(metadata),
              headers=self._headers
          )
          if response.content == b'true\n':
              return True
          else:
              logger.info(self._parse_search_response(response.content))
              return False